DE2810324A1 - Anchor bolt for door or window frames - has sleeve slotted to take non-detachable tapered expander member - Google Patents

Abstract

The anchor bolt is for securing frames in position and bridging gaps in solid and inhomogeneous building material or wood. An anchor portion (1) has a conical expander member (2) pulled into the sleeve (3). At the opposite end to the expanding area is a sleeve section (111) accommodating the item to be secured. The sleeve is slotted to take the expander member, which is so secured to it that it cannot be detached. The expanding shanks (3b) of the sleeve, offset 90 deg. from each other, can be of different lengths, and their end edges can be radiused.

Description

Dowels

The invention is preferably divided into three areas One-piece dowel with expansion body for anchoring in the building material, construction elements for receiving the objects to be fastened and held and the intermediate sleeve for support and load absorption.

Such dowels have become known as special dowels for spacer fixings, For fastening windows and / or door frames and hollow profiles made of wood, metal or plastic.

All have the task in common, the object to be attached (Frame, hollow profile) to hold the anchor sleeve in the building material and possible To bridge gaps between the building material and the object to be fastened.

The dowels of this type that have become known therefore have an expansion body, which spreads the dowel sleeve at the beginning of the dowel when the fastening screw is tightened and in Building material anchored and then the dowel sleeve, the slotted or unslotted encloses the fastening screw and attached to it outer end holding organs, mostly in the form of partially encircling shoulders for receiving and placing the objects to be fastened.

The total length of such dowels is usually much longer than that Dowel length of so-called normal dowels, which are not suitable for such spacing assemblies to be carried out optimally and do not have a dowel sleeve that holds the fastening screw up to her head.

The dowels of this type that have now become known are suitable for this purpose, as they are advantageous over so-called normal dowels without an elongated sleeve, without a retaining element, without an intermediate piece, but still have still have significant disadvantages. The known frame anchors do not have an expansion body, which is secured against loss. So it happens that the expansion body is already is lost when the dowel is hammered in or not when the screw is tightened is taken because the expansion body is, for example, in a drill hole that has been drilled too deep and / or already when inserting the dowel into the borehole from the fastening screw has loosened, i.e. has been lost, and there is no suit when fastening can.

The expansion body on the dowel according to the invention cannot be lost.

In the embodiment A, the expansion body according to the invention has a or several lugs in the area where the expansion body engages in the expansion sleeve. At this point, the expansion sleeve has incisions in the manner of windows which the noses lock into place. The incisions for the noses are advantageous attached in the slot plane and not in the full material area of the dowel sleeve, so that when the expansion body is drawn in, the tightening torque is fully applied as an expansion force the dowel leg is transferred.

The dowel according to the invention has one or more such arranged Noses with associated incisions, if one or more slot planes available.

In another, essential design of the invention after execution B at least one spreader leg is not continuously slotted at its outer end, so that a rectangular, flag-like section is created. Behind the flag comes the nose of the expansion body to the plant.

This arrangement prevents it from being hit again and screwing in, the expansion body can loosen from the sleeve.

Due to the design according to the invention of the expansion body and the expansion sleeve the expansion path and the expansion direction of the expansion body are in multiple ways secured: the locking mechanism in versions A and B secures the expansion body against self-loosening in the direction of the beginning of the dowel; further retraction of the expansion body does not lead to undesired, uncontrolled pulling through of the expansion body the dowel sleeve, a danger particularly in soft building materials, perforated and chamber stones has become known.

The combination of the features of the noses on the expansion body and incisions according to design A, or flag according to design B in the expansion sleeve are therefore both Loss security as well as pull-through security.

The expansion body of frame dowels of known type is already, but only secured against turning the cone when tightening the fastening screw, for example by a rising, about 1 mm wide rib in the longitudinal direction the outer surface of the cone. Such or a similar, additional facility on the dowel according to the invention is not necessary, since the run and pull-through security in a third function, it is also rotational security and the nose in the incisions, respectively.

behind the flag from the start prevents the expansion body from rotating.

As is known per se, the dowel legs are the inventive dowel Different lengths at the beginning of the dowel in order to offset the expansion pressure Transfer zones. In addition, by enlarging the jacket P flags) at the extreme end of one or more of the spreading legs of different lengths the expansion pressure area increased. The protruding edge inevitably leads to wedging in the building material and forms like the recesses to be described in more detail on the Dowel legs a form-fluid connection that the dowel is also in pressure and Secure the direction of pull.

Advantageously, the expansion body according to the invention has pairs of opposing spreading planes offset by 900 that differentiate the long dowel legs are adapted. This shifts the spreading pressure by 900 and gradually transferred to the building material.

This geometry of the expansion body absolutely prevents the expansion body rotates when the screw is tightened.

This is particularly beneficial in soft building materials, perforated and Kammerstein, because the spreading pressure in different levels, over a special long spreading range and without the different spreading planes being mutually exclusive negatively affect by pressure compensation, is transferred to the building material.

The dowel according to the invention with its inventive features, noses, Cuts, or flags, thus fulfills at least 3 important ones in dowel technology Functions that are crucial for anchoring security. One of the three Anchoring security, namely the limitation of the axial displacement of the The expansion body is achieved through the combination of the following features: in execution A with windows by the length of the window, In version B with flag through the contact of the expansion body end on the inwardly standing beads in the intermediate part of the dowel sleeve; in addition are for the limitation of the expansion body inwardly directed tongues attached with so-called predetermined kinks, the Draw in the expansion body and bend in addition a form-fluid connection manage between dowel sleeve and building material.

Two further measures of anchoring security, namely loss of and security against rotation have already been described above.

According to the task, frame dowels are mainly used in building materials with low Intrinsic strength used. Hence the task, one in the anchoring part also to create a partially elastic positive connection between the dowel sleeve and borehole wall. According to the invention, the expansion legs of the dowel sleeve are in Anchoring area with holes or any other shaped opening, any across or lengthways to the dowel axis. Such openings are able to to dig into a wide variety of building materials, so that a form-fitting Connection between building material and dowel sleeve is established.

If the anchoring is overstressed, the form-fitting Connection can be destroyed by shearing off the enclosed building material. The form-fitting Connection secures the anchoring lengthways to the dowel axis in case of overstressing Push and pull direction. The front edges are a further design of the expansion sleeve the expansion sleeve advantageously rounded. It has been shown that dowels the known type abut with their sharp edges in the borehole and the introduction into the borehole or even complicate the building material, for example soft, fibrous Tear up insulating materials.

Expansion anchor for fixing windows and door frames and Hollow profiles are designed to fulfill their multiple functions, namely to anchor and fasten. Take up the load at the beginning of the dowel, as described, as an expansion sleeve dowel formed with expansion body, and have holding members for receiving at their dowel end the fastening objects to be held.

There are already known dowels whose dowel ends one or is slotted several times in the longitudinal direction of the dowel and in further training transverse ribs in the manner of shoulders have only a short distance from the end of the dowel, for support of frames, profiles or the like. The anchor according to the invention has such, protruding transverse slits in the manner of shoulders to support those to be held Fixing items too. It has been shown, however, that such holding elements in many construction cases are insufficient and do not prevent the too holding fastening objects are aligned, but only rest loosely.

The invention has therefore set itself the task of addressing these disadvantages to be eliminated by the additional design of the longitudinal slot (s). The dowel according to the invention does not have a continuous longitudinal slot, but rather a jagged, staggered slit protruding beyond its radius, with at least one, advantageously several such serrations lying one behind the other.

When squeezing the issued across the serrated slot Shoulder now inevitably overlaps, i.e., an increase in diameter in the serrated slot plane through the serrations into which the to be fastened Frames or profiles or the like engaging or

be pressed in and the aligned frame immovable in its Fix the position.

The invention has also set itself the task of eliminating the excessively long Dowel sleeve between anchoring part (dowel start) and construction part (Dowel end) to reinforce. In the case of the dowels of the known type, the intermediate part is the dowel sleeve unprocessed and only serves to close the extra-long screw cover, which has no other function than the expansion of the dowel sleeve at To cause tightening of the expansion body and to determine the fastening length and depth. But it has now been shown that the intermediate part of the dowel sleeve is due to the excess length must absorb significant bending loads. According to the invention, the dowel sleeve therefore reinforced approximately in the middle of their length by inwardly directed beads, where the beads have the task of creating the space between the non-load-bearing screw shank and dowel sleeve to be bridged. According to the invention there are approximately at least 3 such beads evenly distributed on the circumferential surface of the intermediate sleeve, so that at least a bead comes into play. Preliminary tests have shown that the load capacity across the dowel sleeve in the area of the intermediate piece increases significantly if such The corrugations reinforce the sleeve. The beads as a pull-through protection for the expansion body have already been described.

Another feature of the invention is a fundamentally known setting and depth marking to determine the anchoring and minimum insertion depth in the Building material on the circumference of the dowel sleeve, characterized by at right angles to the dowel axis continuous, circumferential or interrupted, circumferential notches.

It is also conceivable that the dowel is not in one piece, but from several parts, corresponding to the three functions described, independently is produced from each other and the parts, depending on the application, shortly before assembly be completed. The anchoring part can therefore also be any other Dowel element, e.g. a plastic dowel.

The following is the invention with its features essential to the invention Explained in more detail with reference to drawings: Fig. 1, 2 show the dowel in an overall view FIG. 3 shows the section from FIG. 1 in section A-A. FIG. 4 shows the section from Figure 2 in section B-B Fig. 5a, 5b shows the anchoring part of the anchor according to the design B Fig. 6a, 6b show the anchoring part of the anchor according to embodiment A Fig. 7a, 7b, 7c show the holding part of the dowel when a frame is received.

Fig. 8a, 8b show the compressed holding part of the anchor and as it engages in a frame. Fig. 9 shows the anchoring part of the anchor in installed state Fig. 10 shows the pull-through protection for the expansion body Of the Dowel 1 according to Figures 1 and 2 is in the area I "anchoring part", the area II "intermediate sleeve" and the area III "holding part" are subdivided.

In the anchoring part and the beginning of the anchor, the anchor 1 has the expansion body 2 and the adjoining dowel sleeve start 3a of the dowel sleeve 3.

The dowel sleeve 3 is at least 2 times opposite in this area slotted so that expansion legs 3b arise, which are when retracting the expansion body 2 expand. The expansion legs 3b are designed and run of different lengths at its outermost end when the lateral surface of the expansion legs 3b is approximately rectangular is enlarged, in the manner of a flag 3c. The expansion body 2 has on his Jacket surface nose-like elevations 2a, which when retracting the expansion body 2 such as Figure 2 in area I shows behind the flag-like section 3c of the different long expansion legs 3b come to rest and in the longitudinal slot 3d of the dowel sleeve 3. In area I of the dowel 1 are still in the expansion legs 3b openings 4 disclosed, which are arbitrarily shaped and arranged punchings in represent the splay legs.

The longitudinal slot 3d of the dowel sleeve 3 leads into the area II of the dowel 1. The area II of the anchor 1 is the extension of the anchor sleeve 3 and can over be both slotted and unslotted for most of its length.

The dowel sleeve 3 in area II of the dowel 1 has on its outer surface at least 3 inwardly directed beads 5 as in Figures 1 and 2 and in section Figure 4 show.

The beads 5 run through almost the entire surface of the dowel sleeve 3 in area II of the anchor 1. Figures 1, 2 also show in area II of the anchor 1 the notches 10 lying transversely to the dowel axis for the purpose of setting and depth marking in the dowel sleeve 3, depending on the total dowel length in area II of the dowel 1 are attached in different places.

The extension of the dowel sleeve 3 towards the end of the dowel leads to Area III of the anchor 1. The anchor sleeve 3 is in the area III of the anchor 1 over provided with a zigzag-shaped slot 6 for most of its length. Of the zigzag-shaped longitudinal slot 6 is formed by interlocking prongs 6a, which are shifted during assembly and due to the resulting increase in diameter engage in the object to be fastened.

At its end, the dowel sleeve has 3 cut transverse slots 7, which protrude like a bulb and form the shoulder 7a, both of which are about 900 of the The peripheral surface of the dowel sleeve 3 are wide and centered on the peripheral surface of the dowel sleeve are arranged to receive the fastening objects to be held.

FIG. 3 shows the exposed shoulders 7a particularly clearly.

In Figures 5a, b and 6a, b, the embodiments A, B are the Spreader body -rotation-, -loose-, and pull-through security shown.

In the embodiment A according to FIGS. 6a, b, the expansion body has 2 nose-like elevations 2a, for example quadrangular or polygonal, on its lateral surface or round shape, which engage in any shaped cutout 8 of the dowel sleeve 3.

The expansion path of the expansion body is determined by the length of the cutout 8 2 set, so that as Figure 6b, the expansion body 2 illustrates only the path of the Cut-out length <can cover.

In the embodiment B according to FIGS. 5a, b, the expansion body has 2 the above-mentioned nose-like elevations 2a, which, as in FIGS. 1 and 2, are already described, behind the rectangular widened flag section 3c of the extended Dowel sleeve 3 come to rest.

The front edges 3e of the dowel sleeve 3 are advantageously rounded.

Figures 7a, b, c and 8a, b show the holding and fastening function in area III of the anchor 1 in detail as already described in FIGS. 1 and 2.

In Figure 7a, b shows how the transverse slots 7 of the dowel sleeve 3 take up the object to be held and fastened 9 (frame or the like).

FIG. 7c shows the enlarged diameter 7a of the dowel sleeve 3 through the protruding shoulders 7a, on which are to be held and fastened Support objects 9 (frame, hollow profiles or the like).

In Figure 8a and b it is shown how the serrated longitudinal slit 6 with their prongs 6a in the object 9 to be fastened, for example wood Diameter enlargement in the slot plane & engages.

In Figure 9, the function of the anchor 1 is rich in the anchoring area I clarified, here in building material 9a with chambers and webs.

The spreading legs 3b of different lengths come in staggered positions Zones 2 / I, 2 / II offset by 900 in the building material of concern, as they are different long expansion planes 2 / I, 2 / II of the expansion body 2 one behind the other in the expansion legs 2b intervene and open them one after the other at the same time.

The pull-through protection of the expansion body 2 by the beads 5 shows Figure 9 in number 5a.

The notches 10 determine the setting and depth marking for the Dowel 1.

FIG. 10 illustrates the limitation of the expansion path of the expansion body 2 by inwardly directed locking tongues 11.

The locking tongues 11 are over when the expansion body 2 is drawn in their intended kinks lla pressed outwards into the building material 9a.

Claims (16)

Claims dowels with fastening element for fastening & l. Frames, profiles or the like and for bridging distances in solid or inhomogeneous building materials, wood or the like, with an anchoring part I with a conically shaped expansion body 2, which can be pulled into the dowel sleeve 3 and a dowel sleeve section III opposite the expansion area for receiving the objects to be fastened and held, characterized in that the Dowel sleeve 3 is slotted for receiving the expansion body 2 and the expansion body 2 is captively connected to the dowel sleeve 3. 2. Dowel according to claim 1, characterized in that the expansion legs 3b of the dowel sleeve 3 offset by 900, are of different lengths. 3. Dowel according to claim 1 and 2, characterized in that the end edges 3e of the expansion legs 3b are rounded. 4. Dowel according to claim 1, 2 and 3, characterized in that a or several expansion legs 3b of the dowel sleeve 3 are not continuously slotted, so that an approximately rectangular, flag-like section 3c is created. 5. Dowel according to claims 1, 2 and 3, characterized in that one or several expansion legs 3b have window-like cutouts 8 for receiving of the nose-like locking member 2a on the expansion body 2. 6. Dowel according to claims 1-5, characterized in that on the circumferential surface of the expansion legs 3b in the expansion area openings 4 different Form. 7. Dowel according to claim 1 with a retractable in the dowel sleeve 3 Expansion body 2, characterized in that the expansion body has 2 step-shaped expansion zones 2 / I, 2 / II owns. 8. Dowel according to claim 7, characterized in that the step-shaped Expansion zones 2 / I, 2 / II of the expansion body 2 are offset by 900. 9. Dowel according to claim 1,7 and 8, characterized in that the cone-like expansion body 2 one or more protruding lugs 2a for locking has in the expansion sleeve 3. 10. Dowel according to claim 1, characterized in that in the expansion area I of the dowel sleeve 3 inwardly directed locking tongues 11 are present to allow pulling through of the expansion body 2 to prevent. 11. Dowel according to claim 1 and 10, characterized in that the inwardly directed locking tongues 11 of the dowel sleeve 3 predetermined kinks lla about have in the middle of their area, which buckle when the expansion body 2 is drawn in. 12. Dowel according to claim 1, characterized in that the dowel sleeve 3 in the load and bending area II of the anchor 1, by inwardly directed beads 5 is reinforced. 13. Dowel according to claim 1, characterized by clearly visible, about 1-2mm wide, continuous or interrupted circumferential notches 10 on the circumferential surface of the intermediate sleeve to mark the minimum setting and insertion depth. 14. Dowel according to claim 1, characterized in that the Dowel sleeve 3 at the end of the dowel incised transverse slots 7 which protrude and the shoulder 7a for receiving and supporting frames, strips, profiles or the like form and the transverse slots 7 una their shoulders 7a about 900 of the circumferential surface Take the slotted dowel sleeve -3. 15. Dowel according to claim 1, characterized by a serrated longitudinal slot 6 in the end of the dowel sleeve 3. 16. Dowel according to claim 1 and 15, characterized in that the one behind the other and interconnected prongs 6a of the serrated longitudinal slot 6 protrude beyond the diameter of the dowel sleeve when pressed together and through the resulting enlargement of the diameter, the claws in the fastening object cause.